PROMPT: CREATE A FULL PERSONAL WEBSITE AGENCY SINGLE PAGE

You are an expert web designer and developer. Create a complete, responsive, single-page personal agency website using HTML, CSS, and JavaScript. Include:

1. NAVIGATION:
- Fixed/sticky header with logo and menu links (Home, Services, Portfolio, Testimonials, Contact)
- Mobile hamburger menu

2. HERO SECTION:
- Full-width background with gradient overlay
- Agency name and tagline
- Professional headshot placeholder
- Call-to-action button "Get Started"

3. SERVICES SECTION:
- 3-4 service cards with icons
- Web Design, Development, Marketing, Consulting

4. PORTFOLIO SECTION:
- 4-6 project cards with images
- Hover effects showing project title and description

5. TESTIMONIALS SECTION:
- 3-4 client testimonials with photos

6. CONTACT SECTION:
- Contact form (Name, Email, Message)
- Phone, email, address
- Social media links

7. FOOTER:
- Copyright information
- Quick links
- Social icons

STYLE REQUIREMENTS:
- Modern, professional color scheme
- Smooth animations and transitions
- Fully responsive (mobile-first)
- Clean typography (Google Fonts)
- Font Awesome icons

FUNCTIONALITY:
- Smooth scrolling
- Form validation
- Mobile menu toggle
- Scroll animations
- Active nav highlighting

Generate the complete code in a single HTML file with embedded CSS and JavaScript.